list_del corruption. prev->next should be ffff0000c98c6ac8, but was ffff80000cb97951. (prev=ffff0000c9823ac8)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:61!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 3081 Comm: kworker/u5:8 Not tainted 6.0.0-rc2-syzkaller-16455-ga41a877bc12d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: hci4 hci_error_reset

pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __list_del_entry_valid+0xbc/0xd0 lib/list_debug.c:59
lr : __list_del_entry_valid+0xbc/0xd0 lib/list_debug.c:59
sp : ffff800012903b10
x29: ffff800012903b10
 x28: ffff80000d2fb000
 x27: ffff0000c93c0025

x26: 0000000000000000
 x25: 0000000000000000
 x24: ffff0000c0dec980

x23: ffff0000c288cf80
 x22: ffff800009a713e8
 x21: ffff0000c0f34149

x20: ffff0000c98c6ac0 x19: ffff0000c98c6ad8 x18: 00000000000000c0
x17: 20747562202c3863 x16: ffff80000dbb8658 x15: ffff0000c288cf80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c288cf80
x11: ff808000081c39dc x10: 0000000000000000 x9 : 9324c369e68e3000
x8 : 9324c369e68e3000 x7 : ffff800008197c8c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0001fefddcd0 x1 : 0000000100000001 x0 : 000000000000006d
Call trace:
 __list_del_entry_valid+0xbc/0xd0 lib/list_debug.c:59
 generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:127 [inline]
 wb_exit mm/backing-dev.c:360 [inline]
 release_bdi mm/backing-dev.c:967 [inline]
 kref_put+0x6c/0x224 include/linux/kref.h:65
 klist_dec_and_del lib/klist.c:206 [inline]
 klist_put lib/klist.c:217 [inline]
 klist_del+0x58/0xb0 lib/klist.c:230
 device_del+0x280/0x5bc drivers/base/core.c:3699
 hci_conn_del_sysfs+0xb0/0xfc net/bluetooth/hci_sysfs.c:78
 hci_conn_cleanup+0x2d4/0x36c net/bluetooth/hci_conn.c:147
 hci_conn_del+0x144/0x294 net/bluetooth/hci_conn.c:1022
 hci_conn_hash_flush+0xe8/0x148 net/bluetooth/hci_conn.c:2367
 hci_dev_close_sync+0x478/0x8e0 net/bluetooth/hci_sync.c:4476
 hci_dev_do_close net/bluetooth/hci_core.c:554 [inline]
 hci_error_reset+0xac/0x154 net/bluetooth/hci_core.c:1050
 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
 worker_thread+0x340/0x610 kernel/workqueue.c:2436
 kthread+0x12c/0x158 kernel/kthread.c:376
 ret_from_fork+0x10/0x20
Code: f001b5e0 910d7000 aa0803e3 94a810c6 (d4210000) 
---[ end trace 0000000000000000 ]---